/**
 * @author David
 */
function countdown_clock(year, month, day, hour, minute, format)
 {
	 //I chose a div as the container for the timer, but
	 //it can be an input tag inside a form, or anything
	 //who's displayed content can be changed through
	 //client-side scripting.
	 html_code = '<div id="countdown"></div>';
	 document.write(html_code);
	 countdown(year, month, day, hour, minute, format);                
 }
 
function countdown(year, month, day, hour, minute, format)
 {
 Today = new Date();
 Todays_Year = Today.getFullYear() - 2000;
 Todays_Month = Today.getMonth();                  
 
 //Convert both today's date and the target date into miliseconds.                           
 Todays_Date = (new Date(Todays_Year, Todays_Month, Today.getDate(), 
                         Today.getHours(), Today.getMinutes(), Today.getSeconds())).getTime();                                 
 Target_Date = (new Date(year, month - 1, day, hour, minute, 00)).getTime();                  
 
 //Find their difference, and convert that into seconds.                  
 Time_Left = Math.round((Target_Date - Todays_Date) / 1000);
 
 if(Time_Left < 0)
    Time_Left = 0;
 
 switch(format)
       {
       case 0:
            //The simplest way to display the time left.
            document.getElementById('countdown').innerHTML = Time_Left + ' segundos';
            break;
       case 1:
            //More datailed.
            days = Math.floor(Time_Left / (60 * 60 * 24));
            Time_Left %= (60 * 60 * 24);
            hours = Math.floor(Time_Left / (60 * 60));
            Time_Left %= (60 * 60);
            minutes = Math.floor(Time_Left / 60);
            Time_Left %= 60;
            seconds = Time_Left;
            
            dps = 's'; hps = 's'; mps = 's'; sps = 's';
            //ps is short for plural suffix.
            if(days == 1) dps ='';
            if(hours == 1) hps ='';
            if(minutes == 1) mps ='';
            if(seconds == 1) sps ='';
            
            document.getElementById('countdown').innerHTML = '<h3>' + 'Faltan ' +days + ' día' + dps + '</h3><br /> ';
            document.getElementById('countdown').innerHTML += '<h4>' + hours + ' hora' + hps + ' ' +
            												+ minutes + ' minuto' + mps + ' y ' +
            												+ seconds + ' segundo' + sps + '</h4>';
			break;
       default: 
            document.getElementById('countdown').innerHTML = Time_Left + ' segundos';
       }
       
 //Recursive call, keeps the clock ticking.
 setTimeout('countdown(' + year + ',' + month + ',' + day + ',' + hour + ',' + minute + ',' + format + ');', 1000);
 }